Lower Big Root

Definitely not a false mako. It's too tapered and slender in all axes; false makos may be tapered from the front, but will still be more robust when viewed from the side.

I agree not a false mako. I found one similiar to yours and also thought maybe it was one??? A few months ago while digging at our quarry my husband brought over a tooth he thought was a small megalodon, but I instantly knew it was a benedeni. When you find one there is no mistaking it for a cosmopolitodus lower. It really is a lot more robust like THobern states.